大断面巷道风量精准测量数值模拟研究
Numerical simulation research on accurate measurement of air volume in large-size roadway
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摘要: 目前大断面巷道风量精准测量已然成为困扰矿井通风系统管理人员的一道难题；为了解决这一问题，首先借助COMSOL Multiphysics软件的湍流模拟功能，以煤矿常见的矩形巷道和半圆拱形巷道为例，分别模拟了巷道入口风速为0.25、2、6、12 m/s时，巷道断面中各点瞬时风速的分布情况；发现巷道断面中瞬时风速等于平均风速的位置只与巷道断面的几何特征有关，不会随巷道入口风速的变化而发生改变，验证了“关键环”的存在；然后计算了巷道断面中距离底板1.8 m处的二维截线上各点的瞬时风速，通过后处理功能精准确定了巷道断面中瞬时风速等于平均风速的位置；这样就为精准确定大断面巷道的风量提供了依据；最后为了方便技术人员使用，将计算模型封装成能够独立运行的APP，只需要输入巷道的几何特征参数和入口风速，就可以确定断面中平均风速等值线的位置。Abstract: At present, the accurate measurement of air volume in large-size roadway has become a difficult problem for mine ventilation system managers. In order to solve this problem, firstly, with the help of the turbulence simulation function of COMSOL Multiphysics, taking the common rectangular roadway and semi-circular arch roadway in coal mines as examples, the distribution of instantaneous wind speed at each point in the roadway is simulated when the inlet wind speed is 0.25 m/s, 2 m/s, 6 m/s and 12 m/s. It is found that the position of the instantaneous wind speed equal to the average wind speed in the tunnel is only related to the geometric characteristics of the tunnel, and will not change with the change of the tunnel inlet wind speed, which verifies the existence of the “key ring”. Then the instantaneous wind speed of each point on the two-dimensional line 1.8 m away from the floor in the roadway is calculated, and the position where the instantaneous wind speed is equal to the average wind speed in the roadway is accurately determined by the post-processing function. This provides a basis for accurately determining the air volume of large-size roadway. Finally, in order to facilitate the use, the calculation model is packaged as an APP that can run independently. Only by inputting the geometric parameters of the roadway and the inlet wind speed, the position of the average wind speed contour in the tunnel can be determined.
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[1] 李伟宏，魏志丹．矿井智能通风控制系统研究及应用[J]．工矿自动化，2021，47（Ｓ1）：72－74. LI Weihong, WEI Zhidan. Research of mine intelligent ventilation control system and its application[J]. Industry and Mine Automation, 2021, 47（S1）: 72-74.
[2] 霍曼．大断面拱形巷道风量测量及补偿方法的研究[D]．西安：西安科技大学，2018. [3] 刘明浩．矩形断面巷道风速分布规律的LDA实验研究[D]．阜新：辽宁工程技术大学，2016. [4] 丁翠，何学秋，聂百胜．矿井通风巷道风流分布“关键环”数值与实验研究[J]．辽宁工程技术大学学报（自然科学版），2015，34（10）：1131-1136. DING Cui, HE Xueqiu, NIE Baisheng. Numerical and experimental research on “key ring” distribution of ventilation in mine tunnels[J]. Journal of Liaoning Technical University（Natural Science Edition）, 2015, 34（10）: 1131-1136.
[5] 丁翠．梯形巷道平均风速分布特征的数值与实验研究[J]．中国安全生产科学技术，2016，12（1）：28-32. DING Cui. Numerical and experimental research on distribution characteristics of average wind speed in trapezoid roadway[J]. Journal of Safety Science and Technology, 2016, 12（1）: 28-32.
[6] 刘剑，宋莹，刘明浩，等．基于LDA的均直巷道断面风速分布规律实验研究[J]．中国安全生产科学技术，2015，11（12）：65-71. LIU Jian, SONG Ying, LIU Minghao, et al. Experimental study on distribution laws of wind velocity in straight roadway section based on LDA[J]. Journal of Safety Science and Technology, 2015, 11（12）: 65-71.
[7] 鹿广利，张梦寒，樊聪奇．基于CFD的定点风速测定法的分析[J]．煤炭技术，2015，34（5）：156-157. LU Guangli, ZHANG Menghan, FAN Congqi. Analysis of fixed-point wind speed measurement method based on CFD[J]. Coal Technology, 2015, 34（5）: 156-157.
[8] 国家安全生产监督管理总局,国家煤矿安全监察局.煤矿安全规程[M]．北京：煤炭工业出版社，2016. [9] 罗前刚．基于渡越时间算法的巷道全断面风速仿真分析[J]．自动化与仪表，2021，36（2）：83-87. LUO Qiangang. Simulation analysis of tunnel full section wind speed based on transit time algorithm[J]. Automation & Instrumentation, 2021, 36（2）: 83-87.
[10] 王翰锋．基于Fluent巷道断面平均风速点定位监测模拟研究[J]．煤炭科学技术，2015，43（8）：92-96. WANG Hanfeng. Simulation study on monitoring and measuring location of average air velocity in section of mine roadway based on Fluent[J]. Coal Science and Technology, 2015, 43（8）: 92-96.
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